{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular}{l*{5}{c}}
\toprule
                    &\multicolumn{5}{c}{Probability of Remaining Unregistered}                     \\\cmidrule(lr){2-6}
                    &\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}&\multicolumn{1}{c}{(3)}&\multicolumn{1}{c}{(4)}&\multicolumn{1}{c}{(5)}\\
  Large Firm:       &\multicolumn{1}{c}{= 10}&\multicolumn{1}{c}{= 20}&\multicolumn{1}{c}{= 30}&\multicolumn{1}{c}{= 50}&\multicolumn{1}{c}{= 100}\\
\midrule
Post $\times$ Treat &       0.276***&       0.318***&       0.365***&       0.422***&       0.385***\\
                    &     (0.028)   &     (0.029)   &     (0.030)   &     (0.034)   &     (0.038)   \\
\midrule
Control, Pre- Mean  &        0.84   &        0.80   &        0.78   &        0.75   &        0.72   \\
R2                  &        0.37   &        0.38   &        0.38   &        0.38   &        0.40   \\
N (millions)        &        1.36   &        0.54   &        0.32   &        0.18   &        0.08   \\
\bottomrule
\end{tabular}
}
